What Goes Through The Sink For Wall Mounted Faucets
For wall-mounted faucets, nothing from the faucet itself goes through the sink. The sink remains free of faucet holes because all components of a wall-mounted faucet are installed inside the wall, not through the sink deck. Only drain components pass through the sink.
Wall-mounted faucets are designed so that plumbing connections, valves, and mounting hardware stay behind the wall, keeping the sink surface completely clear.
What Actually Goes Through the Sink
Even though the faucet does not use the sink deck, several other components do.
1. The Drain Assembly
This is the main part that goes through the sink.
Drain body
Flange
Rubber gaskets
Locking nut
Tailpiece
Purpose
Allows water to flow from the sink basin into the plumbing trap.
2. The Pop-Up Drain or Lift Rod (Only if Used)
Some sinks include a pop-up drain system.
What Goes Through the Sink
Vertical lift rod
Linkage bar
Drain mechanism connected under the sink
Note
Not all wall-mounted faucet systems use a pop-up rod. Many modern sinks use a separate push-pop drain instead, which does not require anything to go through the faucet area.
3. Overflow Channel (If the Sink Has One)
Some bathroom basins include an overflow hole near the top.
What Goes Through
A built-in overflow channel
Drain fitting compatible with overflow openings
Function
Prevents sink spillover by redirecting excess water into the drain.
What Does Not Go Through the Sink
A wall-mounted faucet eliminates all the typical deck components used in countertop faucets.
These Do Not Pass Through the Sink
The faucet body
Hot and cold supply lines
Mounting shanks
Handle stems
Faucet base plate
All faucet-related hardware stays behind the wall or on the wall surface.
Where Wall Mounted Faucet Components Are Installed
Behind the Wall
Hot and cold supply pipes
Concealed or partially concealed valve body
Rough-in box
Mounting brackets
On the Wall Surface
Spout
Handle trim
Escutcheon plates
In the Sink
Only the drain assembly
Possible pop-up rod (optional)
Overflow system (optional)
Why Nothing Should Pass Through the Sink for Wall Mounted Faucets
Cleaner, Minimalist Appearance
A wall-mounted faucet keeps the entire sink top smooth and open.
More Counter Space
With no faucet holes, the sink can be positioned closer to the wall or used with vessel sinks.
Flexible Sink Selection
You can use:
No-hole sinks
Single-basin sinks
Vessel bowls
Stone slabs without drilling
Simplified Sink Surface Cleaning
There is no hardware around the rim to collect grime or water stains.
How to Pair the Sink and Wall-Mounted Faucet Correctly
To ensure correct installation, match the faucet to the sink by considering the following measurements:
1. Spout Height Above Sink
Usually 8 to 12 inches above the rim.
2. Spout Reach
Should land directly above the drain to reduce splashing.
3. Sink Depth
Shallow sinks require lower faucet height.
4. Sink Centerline
Faucet must be centered directly over the sink bowl.
Correct Pairing Ensures
Comfortable hand washing
Clean water flow
Minimal splash
Common Mistakes to Avoid
Mistake 1: Buying a Sink With Faucet Holes
A wall-mounted faucet does not need sink holes; choosing such a sink wastes the design benefit.
Mistake 2: Incorrect Spout Reach
If the spout does not land over the drain, water will hit the rim.
Mistake 3: Rough-In Depth Errors
Improper wall depth leads to misaligned trim and spout.
Mistake 4: Not Checking Sink and Faucet Height Together
Incorrect height causes splash issues.
Conclusion
For wall-mounted faucets, no faucet components go through the sink. The only parts that pass through the sink are the drain assembly, optional pop-up rod, and overflow system. All faucet plumbing, valves, and mounting hardware remain inside the wall or on the wall surface.
This setup delivers a clean, modern aesthetic and offers flexibility when choosing sinks, making wall-mounted faucets ideal for both contemporary bathrooms and premium concealed installations.